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Expired European patentEurope

Write request buffering apparatus

EP 0244540 B1 · Applicant: SILICON GRAPHICS, INC.

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Overview

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed December 22, 1986 and granted September 15, 1993. A European patent lasts at most 20 years from filing, so its term ended December 22, 2006.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by June 22, 2012.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledDecember 22, 1986
PublishedNovember 11, 1987
GrantedSeptember 15, 1993
Term endedDecember 22, 2006
Application numberEP 86310038
Classification (CPC)G06F13/1631

Timeline

Timeline From EPO dates

1987198919911993199519971999200120032005Application filedDec 22, 1986PublishedNov 11, 1987Patent grantedSep 15, 1993Term endedDec 22, 2006

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.